author | fparain |
Fri, 11 Dec 2015 09:07:07 -0800 | |
changeset 35071 | a0910b1d3e0d |
parent 33632 | 038347770a9e |
child 35160 | acae4975b367 |
permissions | -rw-r--r-- |
33160 | 1 |
/* |
35071
a0910b1d3e0d
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parents:
33632
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changeset
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* Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
33160 | 3 |
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
|
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* published by the Free Software Foundation. |
|
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
|
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.vm.ci.hotspot; |
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import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM; |
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import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime; |
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import static jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod.Options.UseProfilingInformation; |
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import static jdk.vm.ci.hotspot.HotSpotVMConfig.config; |
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import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE; |
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import java.lang.annotation.Annotation; |
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import java.lang.reflect.Executable; |
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import java.lang.reflect.InvocationTargetException; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Modifier; |
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import java.lang.reflect.Type; |
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import java.util.HashMap; |
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import java.util.Map; |
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33160 | 39 |
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import jdk.vm.ci.common.JVMCIError; |
41 |
import jdk.vm.ci.meta.Constant; |
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import jdk.vm.ci.meta.ConstantPool; |
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import jdk.vm.ci.meta.DefaultProfilingInfo; |
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import jdk.vm.ci.meta.ExceptionHandler; |
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import jdk.vm.ci.meta.JavaConstant; |
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import jdk.vm.ci.meta.JavaMethod; |
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import jdk.vm.ci.meta.JavaType; |
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import jdk.vm.ci.meta.LineNumberTable; |
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import jdk.vm.ci.meta.LineNumberTableImpl; |
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import jdk.vm.ci.meta.Local; |
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import jdk.vm.ci.meta.LocalImpl; |
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import jdk.vm.ci.meta.LocalVariableTable; |
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import jdk.vm.ci.meta.LocalVariableTableImpl; |
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import jdk.vm.ci.meta.ModifiersProvider; |
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import jdk.vm.ci.meta.ProfilingInfo; |
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import jdk.vm.ci.meta.ResolvedJavaMethod; |
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import jdk.vm.ci.meta.ResolvedJavaType; |
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import jdk.vm.ci.meta.Signature; |
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import jdk.vm.ci.meta.SpeculationLog; |
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import jdk.vm.ci.meta.TriState; |
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/** |
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* Implementation of {@link JavaMethod} for resolved HotSpot methods. |
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*/ |
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final class HotSpotResolvedJavaMethodImpl extends HotSpotMethod implements HotSpotResolvedJavaMethod, HotSpotProxified, MetaspaceWrapperObject { |
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/** |
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* Reference to metaspace Method object. |
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*/ |
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private final long metaspaceMethod; |
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private final HotSpotResolvedObjectTypeImpl holder; |
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private final HotSpotConstantPool constantPool; |
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private final HotSpotSignature signature; |
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private HotSpotMethodData methodData; |
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private byte[] code; |
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private Executable toJavaCache; |
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/** |
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* Gets the holder of a HotSpot metaspace method native object. |
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* |
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* @param metaspaceMethod a metaspace Method object |
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* @return the {@link ResolvedJavaType} corresponding to the holder of the |
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* {@code metaspaceMethod} |
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*/ |
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private static HotSpotResolvedObjectTypeImpl getHolder(long metaspaceMethod) { |
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HotSpotVMConfig config = config(); |
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final long metaspaceConstMethod = UNSAFE.getAddress(metaspaceMethod + config.methodConstMethodOffset); |
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final long metaspaceConstantPool = UNSAFE.getAddress(metaspaceConstMethod + config.constMethodConstantsOffset); |
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return compilerToVM().getResolvedJavaType(null, metaspaceConstantPool + config.constantPoolHolderOffset, false); |
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} |
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/** |
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* Gets the JVMCI mirror from a HotSpot method. The VM is responsible for ensuring that the |
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* Method* is kept alive for the duration of this call and the |
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* {@link HotSpotJVMCIMetaAccessContext} keeps it alive after that. |
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* |
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* Called from the VM. |
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* |
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* @param metaspaceMethod a metaspace Method object |
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* @return the {@link ResolvedJavaMethod} corresponding to {@code metaspaceMethod} |
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*/ |
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@SuppressWarnings("unused") |
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private static HotSpotResolvedJavaMethod fromMetaspace(long metaspaceMethod) { |
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HotSpotResolvedObjectTypeImpl holder = getHolder(metaspaceMethod); |
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return holder.createMethod(metaspaceMethod); |
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} |
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HotSpotResolvedJavaMethodImpl(HotSpotResolvedObjectTypeImpl holder, long metaspaceMethod) { |
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// It would be too much work to get the method name here so we fill it in later. |
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super(null); |
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this.metaspaceMethod = metaspaceMethod; |
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this.holder = holder; |
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HotSpotVMConfig config = config(); |
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final long constMethod = getConstMethod(); |
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/* |
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* Get the constant pool from the metaspace method. Some methods (e.g. intrinsics for |
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* signature-polymorphic method handle methods) have their own constant pool instead of the |
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* one from their holder. |
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*/ |
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final long metaspaceConstantPool = UNSAFE.getAddress(constMethod + config.constMethodConstantsOffset); |
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if (metaspaceConstantPool == holder.getConstantPool().getMetaspaceConstantPool()) { |
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this.constantPool = holder.getConstantPool(); |
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} else { |
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this.constantPool = compilerToVM().getConstantPool(null, constMethod + config.constMethodConstantsOffset); |
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} |
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final int nameIndex = UNSAFE.getChar(constMethod + config.constMethodNameIndexOffset); |
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this.name = constantPool.lookupUtf8(nameIndex); |
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final int signatureIndex = UNSAFE.getChar(constMethod + config.constMethodSignatureIndexOffset); |
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this.signature = (HotSpotSignature) constantPool.lookupSignature(signatureIndex); |
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} |
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/** |
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* Returns a pointer to this method's constant method data structure ( |
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* {@code Method::_constMethod}). This pointer isn't wrapped since it should be safe to use it |
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* within the context of this HotSpotResolvedJavaMethodImpl since the Method* and ConstMethod* |
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* are kept alive as a pair. |
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* |
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* @return pointer to this method's ConstMethod |
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*/ |
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private long getConstMethod() { |
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assert metaspaceMethod != 0; |
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return UNSAFE.getAddress(metaspaceMethod + config().methodConstMethodOffset); |
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} |
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@Override |
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public boolean equals(Object obj) { |
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if (this == obj) { |
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return true; |
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} |
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if (obj instanceof HotSpotResolvedJavaMethodImpl) { |
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HotSpotResolvedJavaMethodImpl that = (HotSpotResolvedJavaMethodImpl) obj; |
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return that.metaspaceMethod == metaspaceMethod; |
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} |
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return false; |
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} |
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@Override |
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public int hashCode() { |
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return (int) metaspaceMethod; |
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} |
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||
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/** |
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* Returns this method's flags ({@code Method::_flags}). |
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* |
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* @return flags of this method |
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*/ |
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private int getFlags() { |
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return UNSAFE.getShort(metaspaceMethod + config().methodFlagsOffset); |
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} |
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/** |
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* Returns this method's constant method flags ({@code ConstMethod::_flags}). |
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* |
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* @return flags of this method's ConstMethod |
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*/ |
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private int getConstMethodFlags() { |
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return UNSAFE.getChar(getConstMethod() + config().constMethodFlagsOffset); |
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} |
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@Override |
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public HotSpotResolvedObjectTypeImpl getDeclaringClass() { |
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return holder; |
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} |
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/** |
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* Gets the address of the C++ Method object for this method. |
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*/ |
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public Constant getMetaspaceMethodConstant() { |
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return HotSpotMetaspaceConstantImpl.forMetaspaceObject(this, false); |
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} |
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public long getMetaspacePointer() { |
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return metaspaceMethod; |
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} |
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@Override |
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public Constant getEncoding() { |
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return getMetaspaceMethodConstant(); |
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} |
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/** |
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* Gets the complete set of modifiers for this method which includes the JVM specification |
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* modifiers as well as the HotSpot internal modifiers. |
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*/ |
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public int getAllModifiers() { |
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return UNSAFE.getInt(metaspaceMethod + config().methodAccessFlagsOffset); |
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} |
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@Override |
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public int getModifiers() { |
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return getAllModifiers() & ModifiersProvider.jvmMethodModifiers(); |
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} |
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@Override |
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public boolean canBeStaticallyBound() { |
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return (isFinal() || isPrivate() || isStatic() || holder.isLeaf()) && isConcrete(); |
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} |
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@Override |
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public byte[] getCode() { |
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if (getCodeSize() == 0) { |
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return null; |
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} |
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if (code == null && holder.isLinked()) { |
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code = compilerToVM().getBytecode(this); |
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assert code.length == getCodeSize() : "expected: " + getCodeSize() + ", actual: " + code.length; |
232 |
} |
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return code; |
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} |
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@Override |
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public int getCodeSize() { |
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33632 | 238 |
return UNSAFE.getChar(getConstMethod() + config().constMethodCodeSizeOffset); |
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} |
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@Override |
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public ExceptionHandler[] getExceptionHandlers() { |
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final boolean hasExceptionTable = (getConstMethodFlags() & config().constMethodHasExceptionTable) != 0; |
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if (!hasExceptionTable) { |
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return new ExceptionHandler[0]; |
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} |
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HotSpotVMConfig config = config(); |
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final int exceptionTableLength = compilerToVM().getExceptionTableLength(this); |
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ExceptionHandler[] handlers = new ExceptionHandler[exceptionTableLength]; |
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long exceptionTableElement = compilerToVM().getExceptionTableStart(this); |
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for (int i = 0; i < exceptionTableLength; i++) { |
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final int startPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementStartPcOffset); |
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final int endPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementEndPcOffset); |
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final int handlerPc = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementHandlerPcOffset); |
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int catchTypeIndex = UNSAFE.getChar(exceptionTableElement + config.exceptionTableElementCatchTypeIndexOffset); |
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JavaType catchType; |
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if (catchTypeIndex == 0) { |
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catchType = null; |
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} else { |
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final int opcode = -1; // opcode is not used |
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catchType = constantPool.lookupType(catchTypeIndex, opcode); |
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// Check for Throwable which catches everything. |
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if (catchType instanceof HotSpotResolvedObjectTypeImpl) { |
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HotSpotResolvedObjectTypeImpl resolvedType = (HotSpotResolvedObjectTypeImpl) catchType; |
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if (resolvedType.mirror() == Throwable.class) { |
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catchTypeIndex = 0; |
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catchType = null; |
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} |
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273 |
} |
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} |
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handlers[i] = new ExceptionHandler(startPc, endPc, handlerPc, catchTypeIndex, catchType); |
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// Go to the next ExceptionTableElement |
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exceptionTableElement += config.exceptionTableElementSize; |
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} |
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280 |
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return handlers; |
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} |
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283 |
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284 |
/** |
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* Returns true if this method has a {@code CallerSensitive} annotation. |
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286 |
* |
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* @return true if CallerSensitive annotation present, false otherwise |
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*/ |
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public boolean isCallerSensitive() { |
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33632 | 290 |
return (getFlags() & config().methodFlagsCallerSensitive) != 0; |
33160 | 291 |
} |
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/** |
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* Returns true if this method has a {@code ForceInline} annotation. |
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295 |
* |
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* @return true if ForceInline annotation present, false otherwise |
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297 |
*/ |
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298 |
public boolean isForceInline() { |
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33632 | 299 |
return (getFlags() & config().methodFlagsForceInline) != 0; |
33160 | 300 |
} |
301 |
||
302 |
/** |
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303 |
* Returns true if this method has a {@code DontInline} annotation. |
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* |
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* @return true if DontInline annotation present, false otherwise |
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*/ |
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307 |
public boolean isDontInline() { |
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33632 | 308 |
return (getFlags() & config().methodFlagsDontInline) != 0; |
33160 | 309 |
} |
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/** |
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* Manually adds a DontInline annotation to this method. |
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*/ |
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public void setNotInlineable() { |
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33632 | 315 |
compilerToVM().doNotInlineOrCompile(this); |
33160 | 316 |
} |
317 |
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/** |
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319 |
* Returns true if this method is one of the special methods that is ignored by security stack |
|
320 |
* walks. |
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321 |
* |
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* @return true if special method ignored by security stack walks, false otherwise |
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323 |
*/ |
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324 |
public boolean ignoredBySecurityStackWalk() { |
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33632 | 325 |
return compilerToVM().methodIsIgnoredBySecurityStackWalk(this); |
33160 | 326 |
} |
327 |
||
328 |
@Override |
|
329 |
public boolean isClassInitializer() { |
|
330 |
return "<clinit>".equals(name) && isStatic(); |
|
331 |
} |
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332 |
||
333 |
@Override |
|
334 |
public boolean isConstructor() { |
|
335 |
return "<init>".equals(name) && !isStatic(); |
|
336 |
} |
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337 |
||
338 |
@Override |
|
339 |
public int getMaxLocals() { |
|
340 |
if (isAbstract() || isNative()) { |
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return 0; |
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} |
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33632 | 343 |
HotSpotVMConfig config = config(); |
33160 | 344 |
return UNSAFE.getChar(getConstMethod() + config.methodMaxLocalsOffset); |
345 |
} |
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346 |
||
347 |
@Override |
|
348 |
public int getMaxStackSize() { |
|
349 |
if (isAbstract() || isNative()) { |
|
350 |
return 0; |
|
351 |
} |
|
33632 | 352 |
HotSpotVMConfig config = config(); |
33160 | 353 |
return config.extraStackEntries + UNSAFE.getChar(getConstMethod() + config.constMethodMaxStackOffset); |
354 |
} |
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355 |
||
356 |
@Override |
|
357 |
public StackTraceElement asStackTraceElement(int bci) { |
|
358 |
if (bci < 0 || bci >= getCodeSize()) { |
|
359 |
// HotSpot code can only construct stack trace elements for valid bcis |
|
33632 | 360 |
StackTraceElement ste = compilerToVM().getStackTraceElement(this, 0); |
33160 | 361 |
return new StackTraceElement(ste.getClassName(), ste.getMethodName(), ste.getFileName(), -1); |
362 |
} |
|
33632 | 363 |
return compilerToVM().getStackTraceElement(this, bci); |
33160 | 364 |
} |
365 |
||
366 |
public ResolvedJavaMethod uniqueConcreteMethod(HotSpotResolvedObjectType receiver) { |
|
367 |
if (receiver.isInterface()) { |
|
368 |
// Cannot trust interfaces. Because of: |
|
369 |
// interface I { void foo(); } |
|
370 |
// class A { public void foo() {} } |
|
371 |
// class B extends A implements I { } |
|
372 |
// class C extends B { public void foo() { } } |
|
373 |
// class D extends B { } |
|
374 |
// Would lead to identify C.foo() as the unique concrete method for I.foo() without |
|
375 |
// seeing A.foo(). |
|
376 |
return null; |
|
377 |
} |
|
33632 | 378 |
if (this.isDefault()) { |
379 |
// CHA for default methods doesn't work and may crash the VM |
|
380 |
return null; |
|
381 |
} |
|
382 |
return compilerToVM().findUniqueConcreteMethod(((HotSpotResolvedObjectTypeImpl) receiver), this); |
|
33160 | 383 |
} |
384 |
||
385 |
@Override |
|
386 |
public HotSpotSignature getSignature() { |
|
387 |
return signature; |
|
388 |
} |
|
389 |
||
390 |
/** |
|
391 |
* Gets the value of {@code Method::_code}. |
|
392 |
* |
|
393 |
* @return the value of {@code Method::_code} |
|
394 |
*/ |
|
395 |
private long getCompiledCode() { |
|
33632 | 396 |
HotSpotVMConfig config = config(); |
33160 | 397 |
return UNSAFE.getAddress(metaspaceMethod + config.methodCodeOffset); |
398 |
} |
|
399 |
||
400 |
/** |
|
401 |
* Returns whether this method has compiled code. |
|
402 |
* |
|
403 |
* @return true if this method has compiled code, false otherwise |
|
404 |
*/ |
|
405 |
public boolean hasCompiledCode() { |
|
406 |
return getCompiledCode() != 0L; |
|
407 |
} |
|
408 |
||
409 |
/** |
|
410 |
* @param level |
|
411 |
* @return true if the currently installed code was generated at {@code level}. |
|
412 |
*/ |
|
413 |
public boolean hasCompiledCodeAtLevel(int level) { |
|
414 |
long compiledCode = getCompiledCode(); |
|
415 |
if (compiledCode != 0) { |
|
33632 | 416 |
return UNSAFE.getInt(compiledCode + config().nmethodCompLevelOffset) == level; |
33160 | 417 |
} |
418 |
return false; |
|
419 |
} |
|
420 |
||
421 |
private static final String TraceMethodDataFilter = System.getProperty("jvmci.traceMethodDataFilter"); |
|
422 |
||
423 |
@Override |
|
424 |
public ProfilingInfo getProfilingInfo(boolean includeNormal, boolean includeOSR) { |
|
425 |
ProfilingInfo info; |
|
426 |
||
427 |
if (UseProfilingInformation.getValue() && methodData == null) { |
|
33632 | 428 |
long metaspaceMethodData = UNSAFE.getAddress(metaspaceMethod + config().methodDataOffset); |
33160 | 429 |
if (metaspaceMethodData != 0) { |
430 |
methodData = new HotSpotMethodData(metaspaceMethodData, this); |
|
431 |
if (TraceMethodDataFilter != null && this.format("%H.%n").contains(TraceMethodDataFilter)) { |
|
432 |
System.out.println("Raw method data for " + this.format("%H.%n(%p)") + ":"); |
|
433 |
System.out.println(methodData.toString()); |
|
434 |
} |
|
435 |
} |
|
436 |
} |
|
437 |
||
438 |
if (methodData == null || (!methodData.hasNormalData() && !methodData.hasExtraData())) { |
|
439 |
// Be optimistic and return false for exceptionSeen. A methodDataOop is allocated in |
|
440 |
// case of a deoptimization. |
|
441 |
info = DefaultProfilingInfo.get(TriState.FALSE); |
|
442 |
} else { |
|
443 |
info = new HotSpotProfilingInfo(methodData, this, includeNormal, includeOSR); |
|
444 |
} |
|
445 |
return info; |
|
446 |
} |
|
447 |
||
448 |
@Override |
|
449 |
public void reprofile() { |
|
33632 | 450 |
compilerToVM().reprofile(this); |
33160 | 451 |
} |
452 |
||
453 |
@Override |
|
454 |
public ConstantPool getConstantPool() { |
|
455 |
return constantPool; |
|
456 |
} |
|
457 |
||
458 |
@Override |
|
459 |
public Annotation[][] getParameterAnnotations() { |
|
33632 | 460 |
Executable javaMethod = toJava(); |
33160 | 461 |
return javaMethod == null ? null : javaMethod.getParameterAnnotations(); |
462 |
} |
|
463 |
||
464 |
@Override |
|
465 |
public Annotation[] getAnnotations() { |
|
33632 | 466 |
Executable javaMethod = toJava(); |
33160 | 467 |
return javaMethod == null ? new Annotation[0] : javaMethod.getAnnotations(); |
468 |
} |
|
469 |
||
470 |
@Override |
|
471 |
public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { |
|
33632 | 472 |
Executable javaMethod = toJava(); |
33160 | 473 |
return javaMethod == null ? null : javaMethod.getAnnotation(annotationClass); |
474 |
} |
|
475 |
||
476 |
public boolean isDefault() { |
|
477 |
if (isConstructor()) { |
|
478 |
return false; |
|
479 |
} |
|
480 |
// Copied from java.lang.Method.isDefault() |
|
481 |
int mask = Modifier.ABSTRACT | Modifier.PUBLIC | Modifier.STATIC; |
|
482 |
return ((getModifiers() & mask) == Modifier.PUBLIC) && getDeclaringClass().isInterface(); |
|
483 |
} |
|
484 |
||
485 |
@Override |
|
486 |
public Type[] getGenericParameterTypes() { |
|
33632 | 487 |
Executable javaMethod = toJava(); |
33160 | 488 |
return javaMethod == null ? null : javaMethod.getGenericParameterTypes(); |
489 |
} |
|
490 |
||
491 |
public Class<?>[] signatureToTypes() { |
|
492 |
Signature sig = getSignature(); |
|
493 |
int count = sig.getParameterCount(false); |
|
494 |
Class<?>[] result = new Class<?>[count]; |
|
495 |
for (int i = 0; i < result.length; ++i) { |
|
496 |
JavaType parameterType = sig.getParameterType(i, holder); |
|
497 |
HotSpotResolvedJavaType resolvedParameterType = (HotSpotResolvedJavaType) parameterType.resolve(holder); |
|
498 |
result[i] = resolvedParameterType.mirror(); |
|
499 |
} |
|
500 |
return result; |
|
501 |
} |
|
502 |
||
33632 | 503 |
private Executable toJava() { |
33160 | 504 |
if (toJavaCache != null) { |
33632 | 505 |
return toJavaCache; |
33160 | 506 |
} |
507 |
try { |
|
33632 | 508 |
Class<?>[] parameterTypes = signatureToTypes(); |
509 |
Executable result = isConstructor() ? holder.mirror().getDeclaredConstructor(parameterTypes) : holder.mirror().getDeclaredMethod(name, parameterTypes); |
|
33160 | 510 |
toJavaCache = result; |
511 |
return result; |
|
512 |
} catch (NoSuchMethodException | NoClassDefFoundError e) { |
|
513 |
return null; |
|
514 |
} |
|
515 |
} |
|
516 |
||
517 |
@Override |
|
518 |
public boolean canBeInlined() { |
|
519 |
if (isDontInline()) { |
|
520 |
return false; |
|
521 |
} |
|
33632 | 522 |
return compilerToVM().canInlineMethod(this); |
33160 | 523 |
} |
524 |
||
525 |
@Override |
|
526 |
public boolean shouldBeInlined() { |
|
527 |
if (isForceInline()) { |
|
528 |
return true; |
|
529 |
} |
|
33632 | 530 |
return compilerToVM().shouldInlineMethod(this); |
33160 | 531 |
} |
532 |
||
533 |
@Override |
|
534 |
public LineNumberTable getLineNumberTable() { |
|
33632 | 535 |
final boolean hasLineNumberTable = (getConstMethodFlags() & config().constMethodHasLineNumberTable) != 0; |
33160 | 536 |
if (!hasLineNumberTable) { |
537 |
return null; |
|
538 |
} |
|
539 |
||
33632 | 540 |
long[] values = compilerToVM().getLineNumberTable(this); |
33160 | 541 |
if (values == null || values.length == 0) { |
542 |
// Empty table so treat is as non-existent |
|
543 |
return null; |
|
544 |
} |
|
545 |
assert values.length % 2 == 0; |
|
546 |
int[] bci = new int[values.length / 2]; |
|
547 |
int[] line = new int[values.length / 2]; |
|
548 |
||
549 |
for (int i = 0; i < values.length / 2; i++) { |
|
550 |
bci[i] = (int) values[i * 2]; |
|
551 |
line[i] = (int) values[i * 2 + 1]; |
|
552 |
} |
|
553 |
||
554 |
return new LineNumberTableImpl(line, bci); |
|
555 |
} |
|
556 |
||
557 |
@Override |
|
558 |
public LocalVariableTable getLocalVariableTable() { |
|
33632 | 559 |
final boolean hasLocalVariableTable = (getConstMethodFlags() & config().constMethodHasLocalVariableTable) != 0; |
33160 | 560 |
if (!hasLocalVariableTable) { |
561 |
return null; |
|
562 |
} |
|
563 |
||
33632 | 564 |
HotSpotVMConfig config = config(); |
565 |
long localVariableTableElement = compilerToVM().getLocalVariableTableStart(this); |
|
566 |
final int localVariableTableLength = compilerToVM().getLocalVariableTableLength(this); |
|
33160 | 567 |
Local[] locals = new Local[localVariableTableLength]; |
568 |
||
569 |
for (int i = 0; i < localVariableTableLength; i++) { |
|
570 |
final int startBci = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementStartBciOffset); |
|
571 |
final int endBci = startBci + UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementLengthOffset); |
|
572 |
final int nameCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementNameCpIndexOffset); |
|
573 |
final int typeCpIndex = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementDescriptorCpIndexOffset); |
|
574 |
final int slot = UNSAFE.getChar(localVariableTableElement + config.localVariableTableElementSlotOffset); |
|
575 |
||
576 |
String localName = getConstantPool().lookupUtf8(nameCpIndex); |
|
577 |
String localType = getConstantPool().lookupUtf8(typeCpIndex); |
|
578 |
||
579 |
locals[i] = new LocalImpl(localName, runtime().lookupType(localType, holder, false), startBci, endBci, slot); |
|
580 |
||
581 |
// Go to the next LocalVariableTableElement |
|
582 |
localVariableTableElement += config.localVariableTableElementSize; |
|
583 |
} |
|
584 |
||
585 |
return new LocalVariableTableImpl(locals); |
|
586 |
} |
|
587 |
||
588 |
/** |
|
589 |
* Returns the offset of this method into the v-table. The method must have a v-table entry as |
|
590 |
* indicated by {@link #isInVirtualMethodTable(ResolvedJavaType)}, otherwise an exception is |
|
591 |
* thrown. |
|
592 |
* |
|
593 |
* @return the offset of this method into the v-table |
|
594 |
*/ |
|
595 |
public int vtableEntryOffset(ResolvedJavaType resolved) { |
|
596 |
if (!isInVirtualMethodTable(resolved)) { |
|
597 |
throw new JVMCIError("%s does not have a vtable entry in type %s", this, resolved); |
|
598 |
} |
|
33632 | 599 |
HotSpotVMConfig config = config(); |
33160 | 600 |
final int vtableIndex = getVtableIndex((HotSpotResolvedObjectTypeImpl) resolved); |
601 |
return config.instanceKlassVtableStartOffset() + vtableIndex * config.vtableEntrySize + config.vtableEntryMethodOffset; |
|
602 |
} |
|
603 |
||
604 |
@Override |
|
605 |
public boolean isInVirtualMethodTable(ResolvedJavaType resolved) { |
|
606 |
if (resolved instanceof HotSpotResolvedObjectTypeImpl) { |
|
607 |
HotSpotResolvedObjectTypeImpl hotspotResolved = (HotSpotResolvedObjectTypeImpl) resolved; |
|
608 |
int vtableIndex = getVtableIndex(hotspotResolved); |
|
609 |
return vtableIndex >= 0 && vtableIndex < hotspotResolved.getVtableLength(); |
|
610 |
} |
|
611 |
return false; |
|
612 |
} |
|
613 |
||
614 |
private int getVtableIndex(HotSpotResolvedObjectTypeImpl resolved) { |
|
615 |
if (!holder.isLinked()) { |
|
33632 | 616 |
return config().invalidVtableIndex; |
33160 | 617 |
} |
618 |
if (holder.isInterface()) { |
|
619 |
if (resolved.isInterface()) { |
|
33632 | 620 |
return config().invalidVtableIndex; |
33160 | 621 |
} |
622 |
return getVtableIndexForInterfaceMethod(resolved); |
|
623 |
} |
|
624 |
return getVtableIndex(); |
|
625 |
} |
|
626 |
||
627 |
/** |
|
628 |
* Returns this method's virtual table index. |
|
629 |
* |
|
630 |
* @return virtual table index |
|
631 |
*/ |
|
632 |
private int getVtableIndex() { |
|
33632 | 633 |
assert !holder.isInterface(); |
634 |
HotSpotVMConfig config = config(); |
|
33160 | 635 |
int result = UNSAFE.getInt(metaspaceMethod + config.methodVtableIndexOffset); |
636 |
assert result >= config.nonvirtualVtableIndex : "must be linked"; |
|
637 |
return result; |
|
638 |
} |
|
639 |
||
640 |
private int getVtableIndexForInterfaceMethod(ResolvedJavaType resolved) { |
|
641 |
HotSpotResolvedObjectTypeImpl hotspotType = (HotSpotResolvedObjectTypeImpl) resolved; |
|
33632 | 642 |
return compilerToVM().getVtableIndexForInterfaceMethod(hotspotType, this); |
33160 | 643 |
} |
644 |
||
645 |
/** |
|
646 |
* The {@link SpeculationLog} for methods compiled by JVMCI hang off this per-declaring-type |
|
647 |
* {@link ClassValue}. The raw Method* value is safe to use as a key in the map as a) it is |
|
648 |
* never moves and b) we never read from it. |
|
649 |
* <p> |
|
650 |
* One implication is that we will preserve {@link SpeculationLog}s for methods that have been |
|
651 |
* redefined via class redefinition. It's tempting to periodically flush such logs but we cannot |
|
652 |
* read the JVM_ACC_IS_OBSOLETE bit (or anything else) via the raw pointer as obsoleted methods |
|
653 |
* are subject to clean up and deletion (see InstanceKlass::purge_previous_versions_internal). |
|
654 |
*/ |
|
655 |
private static final ClassValue<Map<Long, SpeculationLog>> SpeculationLogs = new ClassValue<Map<Long, SpeculationLog>>() { |
|
656 |
@Override |
|
657 |
protected Map<Long, SpeculationLog> computeValue(java.lang.Class<?> type) { |
|
658 |
return new HashMap<>(4); |
|
659 |
} |
|
660 |
}; |
|
661 |
||
662 |
public SpeculationLog getSpeculationLog() { |
|
663 |
Map<Long, SpeculationLog> map = SpeculationLogs.get(holder.mirror()); |
|
664 |
synchronized (map) { |
|
665 |
SpeculationLog log = map.get(this.metaspaceMethod); |
|
666 |
if (log == null) { |
|
667 |
log = new HotSpotSpeculationLog(); |
|
668 |
map.put(metaspaceMethod, log); |
|
669 |
} |
|
670 |
return log; |
|
671 |
} |
|
672 |
} |
|
673 |
||
674 |
public int intrinsicId() { |
|
33632 | 675 |
HotSpotVMConfig config = config(); |
33160 | 676 |
return UNSAFE.getChar(metaspaceMethod + config.methodIntrinsicIdOffset); |
677 |
} |
|
678 |
||
679 |
@Override |
|
680 |
public JavaConstant invoke(JavaConstant receiver, JavaConstant[] arguments) { |
|
33632 | 681 |
assert !isConstructor(); |
682 |
Method javaMethod = (Method) toJava(); |
|
33160 | 683 |
javaMethod.setAccessible(true); |
684 |
||
685 |
Object[] objArguments = new Object[arguments.length]; |
|
686 |
for (int i = 0; i < arguments.length; i++) { |
|
687 |
objArguments[i] = HotSpotObjectConstantImpl.asBoxedValue(arguments[i]); |
|
688 |
} |
|
689 |
Object objReceiver = receiver != null && !receiver.isNull() ? ((HotSpotObjectConstantImpl) receiver).object() : null; |
|
690 |
||
691 |
try { |
|
692 |
Object objResult = javaMethod.invoke(objReceiver, objArguments); |
|
693 |
return javaMethod.getReturnType() == void.class ? null : HotSpotObjectConstantImpl.forBoxedValue(getSignature().getReturnKind(), objResult); |
|
694 |
||
695 |
} catch (IllegalAccessException | InvocationTargetException ex) { |
|
696 |
throw new IllegalArgumentException(ex); |
|
697 |
} |
|
698 |
} |
|
699 |
||
700 |
/** |
|
701 |
* Allocates a compile id for this method by asking the VM for one. |
|
702 |
* |
|
703 |
* @param entryBCI entry bci |
|
704 |
* @return compile id |
|
705 |
*/ |
|
706 |
public int allocateCompileId(int entryBCI) { |
|
33632 | 707 |
return compilerToVM().allocateCompileId(this, entryBCI); |
33160 | 708 |
} |
709 |
||
710 |
public boolean hasCodeAtLevel(int entryBCI, int level) { |
|
33632 | 711 |
if (entryBCI == config().invocationEntryBci) { |
33160 | 712 |
return hasCompiledCodeAtLevel(level); |
713 |
} |
|
33632 | 714 |
return compilerToVM().hasCompiledCodeForOSR(this, entryBCI, level); |
33160 | 715 |
} |
716 |
} |